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• W4220937575 abstract "This paper presents a new exact method to calculate worst-case parameter realizations in two-stage robust optimization problems with categorical or binary-valued uncertain data. Traditional exact algorithms for these problems, notably Benders decomposition and column-and-constraint generation, compute worst-case parameter realizations by solving mixed-integer bilinear optimization subproblems. However, their numerical solution can be computationally expensive not only due to their resulting large size after reformulating the bilinear terms, but also because decision-independent bounds on their variables are typically unknown. We propose an alternative Lagrangian dual method that circumvents these difficulties and is readily integrated in either algorithm. We specialize the method to problems where the binary parameters switch on or off constraints as these are commonly encountered in applications, and discuss extensions to problems that lack relatively complete recourse and to those with integer recourse. Numerical experiments provide evidence of significant computational improvements over existing methods." @default.
• W4220937575 created "2022-04-03" @default.
• W4220937575 creator A5055694082 @default.
• W4220937575 date "2022-03-29" @default.
• W4220937575 modified "2023-10-17" @default.
• W4220937575 title "A Lagrangian dual method for two-stage robust optimization with binary uncertainties" @default.
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• W4220937575 doi "https://doi.org/10.1007/s11081-022-09710-x" @default.
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